Display screen cover plate, display module and display device

Abstract

The display screen cover plate, the display module and the display device are provided by the present disclosure, and relate to the technical field of display, and are used for reducing the compressive stress when the display substrate is attached with the display screen cover plate. The display screen cover plate comprises a flat part, at least two curved parts and at least one connecting part. The at least two curved parts comprise adjacent first and second curved parts, and the at least one connecting part comprises a first connecting part between the first and second curved parts. The first connecting part has a first bending edge away from the flat part, and the first bending edge has a plurality of point positions arranged in sequence. From the first curved part to the second curved part, and along the wiring direction of the first bending edge, the cover plate depth of the plurality of point positions changes from large to small and then from small to large. The display screen cover plate is used in the display module and the display device, and the display module and the display device are used for displaying images.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display cover, display module and display device. Background Technology

[0002] With the development of the times, people have increasingly higher requirements for the overall quality of display devices. Four-sided curved products are popular due to their strong visual extension effect and the advantages of curved design, which makes display devices appear thinner, hides bezels, and makes them narrower. However, the presence of the double-fold area in four-sided curved products leads to a lower production yield. Summary of the Invention

[0003] The purpose of the embodiments of this disclosure is to provide a display cover, a display module, and a display device for reducing the compressive stress when the display substrate and the display cover are bonded together.

[0004] To achieve the above objectives, the embodiments of this disclosure provide the following technical solutions:

[0005] On one hand, a display screen cover is provided. The display screen cover includes a flat portion, at least two curved portions, and at least one connecting portion. The connecting portion connects between two adjacent curved portions, the curved portions are connected to the side of the flat portion, and the connecting portion is connected to a corner of the flat portion. The curved portions and the connecting portion extend curvedly toward a first side of the flat portion. The at least two curved portions include adjacent first and second curved portions, and the at least one connecting portion includes a first connecting portion located between the first and second curved portions. The first connecting portion has a first bent edge away from the flat portion, and the first bent edge has a plurality of points arranged sequentially. From the first curved portion toward the second curved portion, and along the direction of the first bent edge, the cover depth of the plurality of points decreases and then increases again. The cover depth of any point is the distance from that point to the plane of the flat portion.

[0006] The display cover plate provided in this embodiment optimizes the structure of the first connecting portion in the display cover plate by making the cover plate depth at the above-mentioned multiple points gradually decrease and then gradually increase from the first bending portion to the second bending portion along the routing direction of the first bending edge. This makes the bending transition of the display cover plate at the first connecting portion smoother, thereby reducing the compressive stress on the first connecting portion during the bonding process between each film layer in the display and the display cover plate. This reduces the risk of defects such as cracks in the display substrate, bubbles between film layers in the display, bubbles between the adhesive layer and the display cover plate, and warping of the heat dissipation film, and improves the production yield of the display module.

[0007] In some embodiments, the plurality of points include: a first point, a second point, and a third point located between the first point and the second point. The first point contacts the first bend, and the second point contacts the second bend; the cover depth of the third point is less than the cover depth of the remaining points of the first bend. The absolute value of the average rate of change of the cover depth of each point located between the first point and the third point is less than the absolute value of the average rate of change of the cover depth of each point located between the third point and the second point.

[0008] In some embodiments, the cover depth at any of the said locations ranges from 0.3 mm to 2.5 mm.

[0009] In some embodiments, the curvature of the plurality of points, from the first curved portion to the second curved portion and along the routing direction of the first bent edge, decreases from large to small and then increases from small to large.

[0010] In some embodiments, the plurality of points include: a first point, a second point, and a third point located between the first point and the second point. The first point contacts the first bend, and the second point contacts the second bend; the curvature of the third point is less than the curvature of the remaining points of the first bend. The absolute value of the average rate of change of curvature of the points located between the first point and the third point is less than the absolute value of the average rate of change of curvature of the points located between the third point and the second point.

[0011] In some embodiments, the curvature range of any of the points is 0.13 to 0.26.

[0012] In some embodiments, the plurality of points include: a first point and a second point; the first point contacts the first curved portion, and the second point contacts the second curved portion. The first curved portion has a first side away from the flat portion, and the cover plate depth of any point on the first side is the same as the cover plate depth of the first point. The second curved portion has a second side away from the flat portion, and the cover plate depth of any point on the second side is the same as the cover plate depth of the second point.

[0013] In some embodiments, the flat portion is a rectangular structure, and the length of the first side is less than the length of the second side. The cover plate depth at the first point is less than the cover plate depth at the second point.

[0014] In some embodiments, the flat portion is a rectangular structure, and the length of the first side is less than the length of the second side. The curvature of the first point is less than the curvature of the second point.

[0015] In some embodiments, the flat portion is a rectangular structure, the number of curved portions is four, and the number of connecting portions is four. The four curved portions further include a third curved portion and a fourth curved portion, and the four connecting portions further include a second connecting portion, a third connecting portion, and a fourth connecting portion. In a clockwise / counterclockwise direction, the third curved portion is located between the second curved portion and the fourth curved portion. The second connecting portion is located between the second curved portion and the third curved portion, the third connecting portion is located between the third curved portion and the fourth curved portion, and the fourth connecting portion is located between the fourth curved portion and the first curved portion.

[0016] On the other hand, this disclosure also provides a display module, which includes a display cover, a display screen, and an adhesive layer as described in any of the above embodiments. The display screen is disposed on a first side of the display cover. The adhesive layer is disposed between the display screen and the display cover.

[0017] In some embodiments, the display screen includes a polarizer, a display substrate, and a heat dissipation film arranged sequentially in a direction away from the display screen cover. In a direction perpendicular to the plane containing the flat portion of the display screen cover, the display substrate overlaps with the curved portion and connecting portion of the display screen cover.

[0018] In some embodiments, the size of the overlapping portion is greater than or equal to 2 mm in a direction parallel to the plane containing the flat portion.

[0019] In another aspect, embodiments of this disclosure also provide a display device, which includes the display module described in any of the above embodiments.

[0020] The above-described display module and display device have the same structure and beneficial technical effects as the display screen cover provided in some of the above embodiments, and will not be described again here. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are merely drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. Furthermore, the drawings described below can be considered as schematic diagrams and are not intended to limit the actual dimensions, etc., of the products involved in the embodiments of this disclosure.

[0022] Figure 1 This is a structural diagram of a display device according to some embodiments of the present disclosure;

[0023] Figure 2 This is a structural diagram of another display device according to some embodiments of the present disclosure;

[0024] Figure 3a This is a front view of a display module according to some embodiments of the present disclosure;

[0025] Figure 3b This is a rear view of a display module according to some embodiments of the present disclosure;

[0026] Figure 3c This is a right view of a display module according to some embodiments of the present disclosure;

[0027] Figure 3d This is a bottom view of a display module according to some embodiments of the present disclosure;

[0028] Figure 3e for Figure 3a A cross-sectional view of a display module along the AA direction is provided in the image.

[0029] Figure 3f for Figure 3a A cross-sectional view of a display module along the BB direction is provided in the image.

[0030] Figure 3g for Figure 3a A cross-sectional view of a display module along the CC direction is provided in the image.

[0031] Figure 3h for Figure 3g A magnified view of the P region of a display module provided in the image;

[0032] Figure 3i for Figure 3a A cross-sectional view of a display module along the DD direction is provided in the image.

[0033] Figure 3j for Figure 3i A magnified view of the Q region of a display module provided in the image;

[0034] Figure 4a This is a structural diagram of a display screen cover according to some embodiments of the present disclosure;

[0035] Figure 4b This is a partial structural diagram of a display screen cover according to some embodiments of the present disclosure;

[0036] Figure 4c for Figure 4a A cross-sectional view along the EE direction of a display cover is provided in the image;

[0037] Figure 4d for Figure 4a A cross-sectional view along the FF direction of a display cover is provided in the image;

[0038] Figure 5a This is a structural diagram of a connection part in one implementation method;

[0039] Figure 5b for Figure 5a A graph showing the changing trend of cover plate depth at various points in the middle;

[0040] Figure 6a This is a structural diagram of a connection portion according to some embodiments of the present disclosure;

[0041] Figure 6b for Figure 6a A graph showing the changing trend of cover plate depth at various points in the middle;

[0042] Figure 6c for Figure 6a A graph showing the trend of curvature changes at various points in the middle. Detailed Implementation

[0043] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0044] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with this embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0045] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0046] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0047] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0048] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0049] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0050] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0051] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0052] like Figure 1 As shown, some embodiments of this disclosure provide a display device 1000. The display device 1000 can be any device that displays images, whether moving (e.g., video) or stationary (e.g., still images), and whether text or images. More specifically, the embodiments are contemplated to be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, MP4 video players, game consoles, television monitors, flat panel displays, computer monitors, cockpit controllers, and / or displays, etc.

[0053] like Figure 2 As shown, the display device 1000 includes a display module 100.

[0054] For example, display module 100 is used to display images.

[0055] For example, the display device 1000 also includes an auxiliary component 200, which is used to provide support for the display module 100 and display signals, etc.

[0056] For example, auxiliary component 200 includes a housing, circuit board, power supply, etc. Display module 100 can be coupled to the circuit board in auxiliary component 200, so that display module 100 can receive display signals provided by the circuit board. Display module 100 can also be coupled to the power supply in auxiliary component 200, so that display module 100 can receive electrical energy provided by the power supply.

[0057] In some embodiments, such as Figure 3a As shown, the display module 100 includes a display cover 10, a display screen 20, and an adhesive layer 30. Figure 3b , Figure 3c , Figure 3d To display views of module 100 from different angles. For example... Figure 3e and Figure 3fAs shown, the display screen 20 is disposed on the first side of the display screen cover 10, and the adhesive layer 30 is disposed between the display screen 20 and the display screen cover 10.

[0058] For example, the display cover 10 has high rigidity to provide protection for the display screen 20. For example, the material of the display cover 10 is glass.

[0059] The relative positions of the display cover 10 and the display screen 20 can vary depending on the location of the display module 100.

[0060] In some examples, Figure 3g for Figure 3a The diagram shows a cross-sectional view of the display module along the CC direction. Figure 3h for Figure 3g A magnified view of a portion of region P, such as Figure 3h As shown, the display screen 20 is disposed on the first side of the display screen cover 10. Figure 3h The adhesive layer 30 between the display screen 20 and the display screen cover 10 is not shown.

[0061] In other examples, Figure 3i for Figure 3a The diagram shows a cross-sectional view of the display module along the DD direction. Figure 3j for Figure 3i A magnified view of the mid-Q region, such as Figure 3j As shown, the display screen 20 is disposed on the first side of the display screen cover 10. Figure 3j The adhesive layer 30 between the display screen 20 and the display screen cover 10 is not shown.

[0062] For example, the adhesive layer 30 is used to bond the display cover 10 to the display screen 20. For instance, the adhesive layer 30 is made of optical adhesive, which has good light transmittance and can avoid affecting the display effect of the display screen 20.

[0063] like Figure 4a As shown, in some embodiments of this disclosure, the display cover 10 includes a flat portion 1, at least two curved portions 2, and at least one connecting portion 3, such as... Figure 4a and Figure 4b As shown, the connecting part 3 connects between two adjacent curved parts 2. The curved part 2 is connected to the side of the flat part 1, and the connecting part 3 is connected to the corner 1A of the flat part 1. Figure 4c and Figure 4d As shown, the curved portion 2 and the connecting portion 3 extend and bend toward the first side of the flat portion 1.

[0064] It should be noted that the first side can be any side of the flat part 1, and the first side surface of the display cover 10 is the side surface of the curved part 2 and the connecting part 3 that are curved and extended.

[0065] For example, the flat portion 1 can be a planar structure. The shape of the flat portion 1 can be, for example, a quadrilateral or a pentagon.

[0066] For example, the number of bent portions 2 can be two, and the number of connecting portions 3 can be one; or, the number of bent portions 2 can be three, and the number of connecting portions 3 can be two; or, the number of bent portions 2 and connecting portions 3 can be other numbers.

[0067] By bending the curved portion 2 and the connecting portion 3 towards the same side of the flat portion 1, the display screen 20 attached to the first side surface of the display screen cover 10 can be covered, thereby providing better protection for the display screen 20.

[0068] For example, in actual production, the structure of the display cover 10 can be formed by hot bending of the glass plate.

[0069] Understandably, in combination Figure 4a and Figure 4b In the direction parallel to the plane where the flat part 1 is located, the two adjacent curved parts 2 extend in different directions, and the two curved parts 2 also bend and extend towards the first side of the flat part 1. Therefore, the connecting part 3 is affected by the two adjacent curved parts 2 together, and the area where the connecting part 3 is located is the double fold area of ​​the display cover 10.

[0070] In some embodiments, such as Figure 3e and Figure 3f As shown, the display screen 20 includes an adhesive layer 30, a polarizer 201, a display substrate 202, and a heat dissipation film 203 arranged sequentially in a direction away from the display screen cover 10.

[0071] It should be noted that during the manufacturing process of the display module 100, multiple film layers in the display screen 20 are sequentially attached to the display screen cover plate 10.

[0072] For example, the display substrate 202 contains many reflective structures, such as various signal lines. When ambient light enters the display substrate 202 from one side of the display cover 10, it is reflected by these reflective structures, and this reflected light interferes with the image to be displayed on the display substrate 202. By providing a polarizer 201, the interference from the reflected light can be minimized.

[0073] For example, the display substrate 202 includes multiple light-emitting devices that can emit light for displaying images. For instance, the light-emitting devices may include OLED (Organic Light Emitting Diode), QLED (Quantum Dot Light Emitting Diodes), etc. For example, the display substrate 202 is a flexible display substrate, which allows for a tighter fit between the display substrate 202 and the display cover plate 10 during the attachment process.

[0074] For example, such as Figure 3b As shown, a portion of the display substrate 202 is bent away from the display cover plate. This reduces the bezel of the display device. Furthermore, because the non-display area of ​​the display substrate 202 is bent, the visible size of the non-display area in the display substrate 202 is reduced, visually improving the screen-to-body ratio of the display device. The display substrate 202 may also include a flexible circuit board, which can be coupled to the auxiliary component 200 of the display device to receive display signals from the auxiliary component 200 for displaying images.

[0075] For example, the heat dissipation film 203 is used to dissipate heat from the display substrate 202. For instance, the material of the heat dissipation film 203 includes a metal material with good thermal conductivity.

[0076] In some examples, combined Figure 3e and Figure 3f In the direction perpendicular to the plane of the flat portion 1 of the display cover 10, the display substrate 202 and the curved portion 2 and connecting portion 3 of the display cover 10 have an overlapping portion M.

[0077] With the above settings, the image displayed on the display substrate 202 can be displayed through the curved portion 2 and the connecting portion 3, thereby realizing the display in the area where the curved portion 2 and the connecting portion 3 of the display cover plate 10 are located. In other words, the curved display function of the display device 1000 is realized, which can make the overall visual bezel of the display device 1000 narrower and the visual experience better.

[0078] In some embodiments, such as Figure 3e and Figure 3f As shown, in the direction parallel to the plane where the flat part 1 is located, the dimension L of the overlapping part M is greater than or equal to 2 mm.

[0079] It is understood that, in the direction parallel to the plane containing the flat portion 1, the aforementioned dimension L can be the dimension of the overlapping portion M in any direction; that is, the dimension of the overlapping portion M in any direction of the plane containing the flat portion 1 is greater than or equal to 2 mm. For example, as... Figure 3eAs shown, the aforementioned dimension L can be the dimension of the overlapping portion M in the X direction, that is, the width of the overlapping portion M is greater than or equal to 2 mm; or, in combination with Figure 3a and Figure 3f The aforementioned dimension L can be the dimension of the overlapping portion M in a direction that forms a certain angle with the X direction, and this disclosure does not limit it in this respect.

[0080] For example, in the direction parallel to the plane where the flat portion 1 is located, the size L of the overlapping portion M can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, etc.

[0081] This configuration can further expand the display area of ​​the display substrate 202 in the bending portion 2 and the connecting portion 3, and visually narrow the bezel of the display device 1000, thereby further improving the visual experience.

[0082] In some embodiments, such as Figure 4a As shown, at least two curved portions 2 include adjacent first curved portions 21 and second curved portions 22, and at least one connecting portion 3 includes a first connecting portion 31 located between the first curved portions 21 and the second curved portions 22. Figure 4b As shown, the first connecting portion 31 has a first bent edge 311 away from the flat portion 1, and the first bent edge 311 has a plurality of points D arranged in sequence.

[0083] It is understandable that the first bent edge 311 has an irregular curve shape, and the first bent edge 311 is located on the surface of the first side of the display cover 10, that is, the first bent edge 311 is located on the inner surface of the display cover 10. Figure 4c As shown, the cover depth h at any point D is the distance from point D to the plane where the flat portion 1 is located. It should be noted that in actual products, the flat portion 1 of the display cover 10 has a certain thickness. The plane where the flat portion 1 is located is the first side surface of the flat portion 1, that is, the inner surface of the flat portion 1 opposite to the display screen 20. Therefore, the cover depth h is the distance from point D to the plane where the inner surface of the flat portion 1 opposite to the display screen 20 is located.

[0084] In one implementation, the cover depth gradually increases at each point along the first bend of the display cover from one end to the other. For example, as... Figure 5a As shown, two intersecting straight lines are drawn at the two side boundaries of the connecting part 3', intersecting at point O'. Starting from point O', the connecting part 3' is divided into nine equal parts at a 10° angle. Therefore, the first bending edge 311' of the connecting part 3' has ten equally divided points D1' to D10'. Figure 5bAs shown, the transition of the cover plate depth h' at the above-mentioned points will adopt a trend of increasing from D1' to D10'. This design will cause the various film layers in the display screen to be subjected to particularly large compressive stress at the connection part 3' during the process of attaching them to the display screen cover plate. This may result in at least one of the following: cracks in the display screen, bubbles between the various film layers of the display screen, between the adhesive layer and the display screen cover plate, and warping of the heat dissipation film, thereby reducing the yield of the display device.

[0085] In some embodiments of this disclosure, the cover plate depth h at the above-mentioned multiple points, from the first curved portion 21 to the second curved portion 22 and along the routing direction of the first bent edge 311, decreases from large to small and then increases again.

[0086] By adopting the above settings, the structure of the first connecting part 31 in the display cover plate 10 can be optimized, making the bending transition of the display cover plate 10 in the first connecting part 31 smoother. This reduces the compressive stress on the first connecting part 31 during the bonding process between the display substrate 202 in the display 20 and the display cover plate 10, thereby reducing the risk of defects such as cracks in the display substrate 202 in the display 20, bubbles between the film layers in the display 20, bubbles between the adhesive layer 30 and the display cover plate 10, and warping of the heat dissipation film 203, and improving the production yield of the display module 100.

[0087] Therefore, in some embodiments of this disclosure, the display cover 10, pointing from the first bent portion 21 to the second bent portion 22, and along the routing direction of the first bent edge 311, by making the cover depth h at each point D on the first bent edge 311 gradually decrease and then increase again, can optimize the structure of the first connecting portion 31 in the display cover 10, making the bending transition of the display cover 10 at the first connecting portion 31 smoother. This reduces the compressive stress on the first connecting portion 31 during the bonding process between the display substrate 202 and the display cover 10 in the display 20, reduces the risk of defects such as cracks in the display substrate 202, bubbles between film layers in the display 20, bubbles between the adhesive layer 30 and the display cover 10, and warping of the heat dissipation film 203, and improves the production yield of the display module 100.

[0088] In some embodiments, such as Figure 4b As shown, the multiple points D of the first bent edge 311 include: a first point D1, a second point D2, and a third point D3 located between the first point D1 and the second point D2. The first point D1 contacts the first curved portion 21, and the second point D2 contacts the second curved portion 22. The cover depth of the third point D3 is less than the cover depth of the other points of the first bent edge 311.

[0089] It is understood that the first point D1 and the second point D2 are the two endpoints of the first bending edge 311. For example, in the process of designing the structure of the first connecting part 31 in the display cover 10, the position of the maximum Gaussian curvature in the first connecting part 31 can be found first. The curvature change is large in the area near this position, and the risk of defects in the above area is higher when the film layers in the display 20 are bonded to the display cover 10. Therefore, the third point D3 in the first bending edge 311 can be set at the position of the maximum Gaussian curvature, thereby reducing the risk of defects in the above area when the film layers and adhesive layer 30 in the display 20 are bonded to the display cover 10.

[0090] In this context, the Gaussian curvature at a point on a surface is the product of the principal curvatures K1 and K2 at that point, and is an intrinsic measure of curvature. The principal curvatures K1 and K2 are defined as follows: At a given point on the surface, there are infinitely many orthogonal curvatures. Among these, there exists a curve whose curvature is maximized (K1), and the curvature perpendicular to the surface with the maximized curvature is minimized (K2). These two curvatures are defined as the principal curvatures K1 and K2. The curvature of a curve indicates the degree to which it deviates from a straight line. The greater the curvature, the greater the curvature of the curve. The reciprocal of the curvature is the radius of curvature.

[0091] For example, such as Figure 6a As shown, Figure 6a The structural diagram of the connecting part 3 shows that, using the same method as in one of the above implementations, the connecting part 3 is divided into nine equal parts. Therefore, the first bent edge 311 of the connecting part 3 has ten equally divided points: D1, D4, D5, D6, D3, D7, D8, D9, and D10. The third point, D3, is the position with the largest Gaussian curvature in the first connecting part 31. For example... Figure 6b As shown, the cover depth h at the aforementioned evenly divided points first gradually decreases and then gradually increases. Correspondingly, the connecting part 3 can also be divided into ten equal parts or other equal parts.

[0092] In some embodiments, such as Figure 6b As shown, the absolute value of the average rate of change of the cover plate depth at each point D between the first point D1 and the third point D3 is less than the absolute value of the average rate of change of the cover plate depth at each point D between the third point D3 and the second point D2.

[0093] For example, in Figure 6b In the case where the connecting part 3 is divided into nine equal parts, the absolute value of the average rate of change of the cover plate depth of any adjacent points of the five points D1, D4, D5, D6, and D3 is less than the absolute value of the average rate of change of the cover plate depth of any adjacent points of the six points D3, D7, D8, D9, D10, and D2.

[0094] With the above settings, the change in cover plate depth h at each point D between the first point D1 and the third point D3 can be relatively gradual, which is beneficial for each film layer in the display screen 20 to be attached to the display screen cover plate 10.

[0095] In some embodiments, the cover plate depth h at any point D in the first bent edge 311 is in the range of 0.3mm to 2.5mm.

[0096] For example, the cover depth h at any of the above points D can be 0.3mm, 0.8mm, 1.3mm, 2.0mm or 2.5mm, etc.

[0097] For example, Figure 6a The values ​​of cover plate depth h at various points are shown in Table 1 below:

[0098] Table 1

[0099] h(mm) 0.629 0.625 0.584 0.489 0.475 0.737 1.234 1.725 1.971 2.009

[0100] With the above settings, the cover plate depth h of each point D can be within a reasonable range, the absolute value of the average change rate of the cover plate depth of each adjacent point D in the first bending edge 311 can be small, the design difficulty of the first connecting part 31 can be simplified, and the bending transition of the display cover plate 10 in the first connecting part 31 can be smoother, reducing the compressive stress on the first connecting part 31 when each film layer in the display 20 is attached to the display cover plate 10, and improving the production yield of the display module 100.

[0101] In some embodiments, from the first curved portion 21 to the second curved portion 22, and along the routing direction of the first bent edge 311, the curvature K of the above-mentioned plurality of points decreases from large to small and then increases from small to large.

[0102] That is, along the direction from the first point D1 to the third point D3, the curvature K of each point D between the first point D1 and the third point D3 gradually decreases. Along the direction from the third point D3 to the second point D2, the curvature K of each point D between the third point D3 and the second point D2 gradually increases.

[0103] For example, Figure 6a The trend of curvature K at the 10 points can be found in [reference needed]. Figure 6c .

[0104] Through the above settings, the structure of the first connecting part 31 in the display cover plate 10 can be further optimized, and the bending transition of the display cover plate 10 in the first connecting part 31 can be made smoother. This further reduces the compressive stress on the first connecting part 31 when each film layer in the display 20 is bonded to the display cover plate 10, and reduces the risk of defects such as cracks in the display substrate 202, bubbles between the film layers in the display 20, bubbles between the adhesive layer 30 and the display cover plate 10, and warping of the heat dissipation film 203. This further improves the production yield of the display module 100.

[0105] In some embodiments, such as Figure 6c As shown, along the direction from the first point D1 to the third point D3, the absolute value of the average rate of change of curvature of each point between the first point D1 and the third point D3 is less than the absolute value of the average rate of change of curvature of each point between the third point D3 and the second point D2 along the direction from the third point D3 to the second point D2.

[0106] For example, in Figure 6c In the case where the connecting part 3 is divided into nine equal parts, the absolute value of the average rate of change of curvature of any adjacent points of the five points D1, D4, D5, D6, and D3 is less than the absolute value of the average rate of change of curvature of any adjacent points of the six points D3, D7, D8, D9, D10, and D2.

[0107] With the above settings, the curvature K of each point D between the first point D1 and the third point D3 can change more gently, which is beneficial for each film layer in the display screen 20 to be attached to the display screen cover plate 10.

[0108] In some embodiments, the curvature K of any point D in the first bent edge 311 is in the range of 0.13 to 0.26.

[0109] For example, the curvature K of any point D can be 0.13, 0.15, 0.2, 0.23 or 0.26, etc.

[0110] For example, Figure 6a The curvature K values ​​at various points are shown in Table 2 below:

[0111] Table 2

[0112] K 0.1936 0.19 0.1875 0.1815 0.1543 0.1564 0.2034 0.2297 0.2432 0.2436

[0113] Through the above settings, the curvature K of each point D can be within a reasonable range, the absolute value of the average rate of change of curvature of each adjacent point D in the first bending edge 311 can be small, the design difficulty of the first connecting part 31 can be simplified, and the bending transition of the display cover plate 10 in the first connecting part 31 can be smoother, reducing the compressive stress on the first connecting part 31 when each film layer in the display 20 is attached to the display cover plate 10, and improving the production yield of the display module 100.

[0114] In some embodiments, such as Figure 4b As shown, the first curved portion 21 has a first side 211 away from the flat portion 1, and the cover plate depth h at any point on the first side 211 is the same, and is also the same as the cover plate depth h at the first point D1. The second curved portion 22 has a second side 221 away from the flat portion 1, and the cover plate depth h at any point on the second side 221 is the same, and is also the same as the cover plate depth h at the second point D2.

[0115] It is understandable that the first side 211 and the second side 221 are straight lines, and both the first side 211 and the second side 221 are located on the surface of the first side of the display cover 10.

[0116] With the above settings, the bending shape of the first bending portion 21 is the same at all points along the direction of the first side 211, and the bending shape of the second bending portion 22 is the same at all points along the direction of the second side 221. This simplifies the design and manufacturing difficulty of the first bending portion 21 and the second bending portion 22, thereby simplifying the design and manufacturing difficulty of the display screen cover 10.

[0117] Furthermore, by making the cover plate depth h at any point on the first side 211 the same as the cover plate depth h at the first point D1, the connection area between the first curved portion 21 and the first connecting portion 31 can be made smoother, which is beneficial for the adhesion of each film layer in the display screen 20 to the display screen cover 10 in the aforementioned connection area. By making the cover plate depth h at any point on the second side 221 the same as the cover plate depth h at the second point D2, the connection area between the second curved portion 22 and the first connecting portion 31 can be made smoother, which is beneficial for the adhesion of each film layer in the display screen 20 to the display screen cover 10 in the aforementioned connection area.

[0118] In some embodiments, such as Figure 4a As shown, the flat portion 1 has a rectangular structure. Figure 4b As shown, the length of the first side 211 is less than the length of the second side 221. Figure 6b As shown, the cover plate depth h at the first point D1 is less than the cover plate depth h at the second point D2.

[0119] It is understandable that, such as Figure 4aAs shown, the length of the first curved portion 21 is less than the length of the second curved portion 22. The cover plate depth h at any point in the first side 211 is less than the cover plate depth h at any point in the second side 221.

[0120] By setting a larger cover depth h at the second point D2, the display screen 20 can enter more of the area where the second curved part 22 is located during the process of attaching to the display screen cover 10 in the direction perpendicular to the plane where the flat part 1 is located, thereby expanding the displayable area of ​​the display screen 20, making the overall visual bezel of the display module 100 narrower and the visual display experience better.

[0121] In some other embodiments, such as Figure 6c As shown, the curvature K of the first point D1 is less than the curvature K of the second point D2.

[0122] The above settings can make the transition of curvature K between the first curved part 21 and the first connecting part 31 smoother, increasing the design and manufacturing difficulty of the display cover 10.

[0123] In some embodiments, such as Figure 4a As shown, the flat portion 1 has a rectangular structure, the number of curved portions 2 is four, and the number of connecting portions 3 is four. The four curved portions 2 also include a third curved portion 23 and a fourth curved portion 24, and the four connecting portions 3 also include a second connecting portion 32, a third connecting portion 33, and a fourth connecting portion 34. The third curved portion 23 is adjacent to the second curved portion 22, and the fourth curved portion 24 is adjacent to the third curved portion 23. The second connecting portion 32 is located between the second curved portion 22 and the third curved portion 23, the third connecting portion 33 is located between the third curved portion 23 and the fourth curved portion 24, and the fourth connecting portion 34 is located between the fourth curved portion 24 and the first curved portion 21.

[0124] For example, the third curved portion 23 is configured in the same way as the first curved portion 21, and the fourth curved portion 24 is configured in the same way as the second curved portion 22. The second connecting portion 32, the third connecting portion 33, and the fourth connecting portion 34 are all configured in the same way as the first connecting portion 31.

[0125] This simplifies the design and manufacturing of the display cover 10.

[0126] Understandably, the display cover 10 has a four-sided curved structure, which makes the display device 1000 look thinner and can hide the bezel of the display device 1000, making the display device 1000 look narrower and visually improving the screen-to-body ratio of the display device 1000.

[0127] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display screen cover, characterized in that, The display cover includes a flat portion, at least two curved portions, and at least one connecting portion. The connecting portion is connected between two adjacent curved portions. The curved portion is connected to the side of the flat portion, and the connecting portion is connected to the corner of the flat portion. The curved portion and the connecting portion extend and bend towards a first side of the flat portion. The at least two curved portions include an adjacent first curved portion and a second curved portion, and the at least one connecting portion includes a first connecting portion located between the first curved portion and the second curved portion; The first connecting portion has a first bent edge away from the flat portion, and the first bent edge has a plurality of points arranged in sequence; From the first curved part to the second curved part, and along the routing direction of the first bent edge, the cover depth of the plurality of points decreases from large to small and then increases from small to large. Wherein, the depth of the cover plate at any point is the distance from that point to the plane where the flat part is located; The plurality of points include: a first point, a second point, and a third point located between the first point and the second point; the first point contacts the first curved portion, and the second point contacts the second curved portion; the cover plate depth of the third point is less than the cover plate depth of the other points of the first bent edge. The absolute value of the average rate of change of the cover plate depth at each point between the first point and the third point is less than the absolute value of the average rate of change of the cover plate depth at each point between the third point and the second point.

2. The display screen cover according to claim 1, characterized in that, The cover plate depth at any of the aforementioned points ranges from 0.3mm to 2.5mm.

3. The display screen cover according to claim 1, characterized in that, From the first curved portion to the second curved portion, and along the routing direction of the first bent edge, the curvature of the plurality of points decreases from large to small and then increases again.

4. The display screen cover according to claim 3, characterized in that, The curvature of the third point is less than the curvature of the other points of the first bend. The absolute value of the average rate of change of curvature of each point located between the first point and the third point is less than the absolute value of the average rate of change of curvature of each point located between the third point and the second point.

5. The display screen cover according to claim 3, characterized in that, The curvature range of any of the points is 0.13 to 0.

26.

6. The display screen cover according to any one of claims 1 to 5, characterized in that, The first curved portion has a first side away from the flat portion, and the cover plate depth is the same at any point on the first side, and is also the same as the cover plate depth at the first point. The second curved portion has a second side away from the flat portion, and the cover plate depth is the same at any point on the second side, and is also the same as the cover plate depth at the second point.

7. The display screen cover according to claim 6, characterized in that, The flat portion has a rectangular structure, and the length of the first side is less than the length of the second side; The cover plate depth at the first point is less than the cover plate depth at the second point.

8. The display screen cover according to claim 6, characterized in that, The flat portion has a rectangular structure, and the length of the first side is less than the length of the second side; The curvature of the first point is less than the curvature of the second point.

9. The display screen cover according to any one of claims 1 to 5, characterized in that, The flat portion has a rectangular structure, the number of curved portions is four, and the number of connecting portions is four; the four curved portions further include a third curved portion and a fourth curved portion, and the four connecting portions further include a second connecting portion, a third connecting portion, and a fourth connecting portion; In the clockwise / counterclockwise direction, the third bend is located between the second bend and the fourth bend; the second connecting part is located between the second bend and the third bend, the third connecting part is located between the third bend and the fourth bend, and the fourth connecting part is located between the fourth bend and the first bend.

10. A display module, characterized in that, The display module includes: Display cover plate as described in any one of claims 1 to 9; The display screen is disposed on the first side of the display screen cover; and, An adhesive layer is disposed between the display screen and the display screen cover.

11. The display module according to claim 10, characterized in that, The display screen includes a polarizer, a display substrate, and a heat dissipation film arranged sequentially in a direction away from the display screen cover. In a direction perpendicular to the plane of the flat portion of the display cover, the display substrate and the curved portion and connecting portion of the display cover have overlapping portions.

12. The display module according to claim 11, characterized in that, In a direction parallel to the plane containing the flat portion, the size of the overlapping portion is greater than or equal to 2 mm.

13. A display device, characterized in that, The display device includes: a display module as described in any one of claims 10 to 12.

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